VC解析XML文件-CMarkup的使用詳解

2020-01-26 16:12:01

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供稿：網(wǎng)友

VC解析XML文件的工具有很多，CMarkup， tinyXML，還有IBM的，MS的等等。
據(jù)說tinyXML很好，可能字符集問題，我編譯不了。
所以就用CMarkup來解析，使用過后，覺得非常不錯，使用起來很方便。
CMarkup下載地址：http://www.firstobject.com/
發(fā)現(xiàn)網(wǎng)上有方法很法，我就摘下來了

復(fù)制代碼代碼如下:

//----------UserInfo.xml--------------    
xml version="1.0" encoding="UTF-8" ?>     
<UserInfo>    
  <UserID>luo</UserID>     
  <UserID>lin</UserID>     
  </UserInfo>   
//----------UserInfo.xml--------------
xml version="1.0" encoding="UTF-8" ?> 
<UserInfo>
<UserID>luo</UserID> 
<UserID>lin</UserID> 
</UserInfo>

一、生成UserInfo.xml

復(fù)制代碼代碼如下:

CMarkup xml;     
xml.SetDoc("xml version=/"1.0/" encoding=/"UTF-8/"?>/r/n");     
xml.AddElem("UserInfo");     
xml.IntoElem();     
xml.AddElem("UserID","luo");     
xml.AddElem("UserID","lin");     
xml.OutOfElem();     
xml.Save("UserInfo.xml");    
CMarkup xml; 
xml.SetDoc("xml version=/"1.0/" encoding=/"UTF-8/"?>/r/n"); 
xml.AddElem("UserInfo"); 
xml.IntoElem(); 
xml.AddElem("UserID","luo"); 
xml.AddElem("UserID","lin"); 
xml.OutOfElem(); 
xml.Save("UserInfo.xml");

二、瀏覽特定元素

復(fù)制代碼代碼如下:

//----查看所有UserID----
CMarkup xml;     
xml.Load("UserInfo.xml");     
BOOL bFind = true;     
xml.ResetMainPos();     
while (xml.FindChildElem("UserID");)     
{     
      //此時接點(diǎn)還是父接點(diǎn)     
        CString strTagName = _T("");     
        CString strData = _T("");     
        strTagName = xml.GetChildTagName();     
        strData = xml.GetChildData();     
        TRACE("/n---tagName:%s,Data:%s--/n",strTagName,strData);     
}     
      /********************這樣也可以******************    
      CMarkup xml;    
      xml.Load("UserInfo.xml");    
      BOOL bFind = true;    
      xml.ResetMainPos();    

      while (xml.FindChildElem("UserID");)    
      {    
                    xml.IntoElem();    
                    CString strTagName = _T("");    
                    CString strData = _T("");    
                    strTagName = xml.GetTagName();    
                    strData = xml.GetData();    
                    TRACE("/n---tagName:%s,Data:%s--/n",strTagName,strData);    
                    xml.OutOfElem();    
      }*/     
      /**************這樣也可以**********************    
      CMarkup xml;    
      xml.Load("UserInfo.xml");    
      BOOL bFind = true;    
      xml.ResetMainPos();    
      xml.FindElem();  //UserInfo    
      xml.IntoElem();    
      while (xml.FindElem("UserID");)    
      {    
                    CString strTagName = _T("");    
                    CString strData = _T("");    
                    strTagName = xml.GetTagName();    
                    strData = xml.GetData();    
                    TRACE("/n---tagName:%s,Data:%s--/n",strTagName,strData);    
      }    
      */     

復(fù)制代碼代碼如下:

//-------------結(jié)果----------     
---tagName:UserID,Data:luo--     
---tagName:UserID,Data:lin―    
//----查看所有UserID----
CMarkup xml; 
xml.Load("UserInfo.xml"); 
BOOL bFind = true; 
xml.ResetMainPos(); 
while (xml.FindChildElem("UserID");) 
{ 
      //此時接點(diǎn)還是父接點(diǎn) 
        CString strTagName = _T(""); 
        CString strData = _T(""); 
        strTagName = xml.GetChildTagName(); 
        strData = xml.GetChildData(); 
        TRACE("/n---tagName:%s,Data:%s--/n",strTagName,strData); 
} 
      /********************這樣也可以****************** 
      CMarkup xml; 
      xml.Load("UserInfo.xml"); 
      BOOL bFind = true; 
      xml.ResetMainPos(); 

      while (xml.FindChildElem("UserID");) 
      { 
                    xml.IntoElem(); 
                    CString strTagName = _T(""); 
                    CString strData = _T(""); 
                    strTagName = xml.GetTagName(); 
                    strData = xml.GetData(); 
                    TRACE("/n---tagName:%s,Data:%s--/n",strTagName,strData); 
                    xml.OutOfElem(); 
      }*/ 
      /**************這樣也可以********************** 
      CMarkup xml; 
      xml.Load("UserInfo.xml"); 
      BOOL bFind = true; 
      xml.ResetMainPos(); 
      xml.FindElem();  //UserInfo 
      xml.IntoElem(); 
      while (xml.FindElem("UserID");) 
      { 
                    CString strTagName = _T(""); 
                    CString strData = _T(""); 
                    strTagName = xml.GetTagName(); 
                    strData = xml.GetData(); 
                    TRACE("/n---tagName:%s,Data:%s--/n",strTagName,strData); 
      } 
      */ 
//-------------結(jié)果---------- 
---tagName:UserID,Data:luo-- 
---tagName:UserID,Data:lin―

三、修改

復(fù)制代碼代碼如下:

//--------把UserID為”luo”改為”flypigluo”-----------
BOOL bLoadXml = false;     
CMarkup xml;     
bLoadXml = xml.Load("UserInfo.xml");     
      if (bLoadXml)     
      {     
              CString strUserID = _T("");     
              xml.ResetMainPos();     
              xml.FindElem();     
              xml.IntoElem();     
              while (xml.FindElem("UserID"))     
              {     
                    strUserID = xml.GetData();     
                    if (strUserID=="luo")     
                    {     
                            xml.SetData(CString("flypig")+strUserID);     
                            xml.Save("UserInfo.xml");     
                            break;     
                    }     
              }     
      }    
//--------把UserID為”luo”改為”flypigluo”----------- 
BOOL bLoadXml = false; 
CMarkup xml; 
bLoadXml = xml.Load("UserInfo.xml"); 
      if (bLoadXml) 
      { 
              CString strUserID = _T(""); 
              xml.ResetMainPos(); 
              xml.FindElem(); 
              xml.IntoElem(); 
              while (xml.FindElem("UserID")) 
              { 
                    strUserID = xml.GetData(); 
                    if (strUserID=="luo") 
                    { 
                            xml.SetData(CString("flypig")+strUserID); 
                            xml.Save("UserInfo.xml"); 
                            break; 
                    } 
              } 
      }

四、添加
1 添在最后面（使用的是AddElem）

復(fù)制代碼代碼如下:

//加在最后面
BOOL bLoadXml = false;     
      CMarkup xml;     
      bLoadXml = xml.Load("UserInfo.xml");     
      if (bLoadXml)     
      {     
              xml.ResetMainPos();     
              xml.FindElem();     
              xml.IntoElem();     
              xml.AddElem("UserID","luoluo");     
              xml.OutOfElem();     
              xml.Save("UserInfo.xml");     
      }     
//--------原來為------     
xml version="1.0" encoding="UTF-8" ?>     
<UserInfo>     
  <UserID>luo</UserID>     
  <UserID>lin</UserID>     
  </UserInfo>     
//---------添加后為-------------     
xml version="1.0" encoding="UTF-8" ?>     
<UserInfo>     
  <UserID>luo</UserID>     
  <UserID>lin</UserID>     
  <UserID>luoluo</UserID>     
  </UserInfo>

2 加在最前面（使用InsertElem）

復(fù)制代碼代碼如下:

BOOL bLoadXml = false;     
CMarkup xml;     
bLoadXml = xml.Load("UserInfo.xml");     
if (bLoadXml)     
{     
      xml.ResetMainPos();     
      xml.FindElem();     
      xml.IntoElem();     
      xml.InsertElem("UserID","AddUserIDHead");     
      xml.OutOfElem();     
      xml.Save("UserInfo.xml");     
}     
//----原來為―     
xml version="1.0" encoding="UTF-8" ?>     
<UserInfo>     
  <UserID>luo</UserID>     
  <UserID>lin</UserID>     
  </UserInfo>     
//------修改后-----     
xml version="1.0" encoding="UTF-8" ?>     
<UserInfo>     
  <UserID>AddUserIDHead</UserID>     
  <UserID>luo</UserID>     
  <UserID>lin</UserID>     
  </UserInfo>    
BOOL bLoadXml = false; 
CMarkup xml; 
bLoadXml = xml.Load("UserInfo.xml"); 
if (bLoadXml) 
{ 
      xml.ResetMainPos(); 
      xml.FindElem(); 
      xml.IntoElem(); 
      xml.InsertElem("UserID","AddUserIDHead"); 
      xml.OutOfElem(); 
      xml.Save("UserInfo.xml"); 
} 
//----原來為― 
xml version="1.0" encoding="UTF-8" ?> 
<UserInfo> 
  <UserID>luo</UserID> 
  <UserID>lin</UserID> 
  </UserInfo> 
//------修改后----- 
xml version="1.0" encoding="UTF-8" ?> 
<UserInfo> 
  <UserID>AddUserIDHead</UserID> 
  <UserID>luo</UserID> 
  <UserID>lin</UserID> 
  </UserInfo>

五、刪除

復(fù)制代碼代碼如下:

CMarkup xml;     
xml.Load("UserInfo.xml");     
BOOL bFind = true;     
xml.ResetMainPos();          
while (bFind)     
{     
      bFind = xml.FindChildElem("UserID");     
      if (bFind)     
      {     
              //此時接點(diǎn)還是父接點(diǎn)     
              CString strData = _T("");     
              strData = xml.GetChildData();     
              if (strData=="luo")     
              {     
                    xml.RemoveChildElem();     
                    xml.Save("UserInfo.xml");     
                    break;     
              }     
      }     
}    
CMarkup xml; 
xml.Load("UserInfo.xml"); 
BOOL bFind = true; 
xml.ResetMainPos();      
while (bFind) 
{ 
      bFind = xml.FindChildElem("UserID"); 
      if (bFind) 
      { 
              //此時接點(diǎn)還是父接點(diǎn) 
              CString strData = _T(""); 
              strData = xml.GetChildData(); 
              if (strData=="luo") 
              { 
                    xml.RemoveChildElem(); 
                    xml.Save("UserInfo.xml"); 
                    break; 
              } 
      } 
}

六、查找
見第二點(diǎn)瀏覽。類似上面的例子里面沒有屬性這些東西，下面的一個例子是有屬性的

復(fù)制代碼代碼如下:

//UserInfo1.xml     
xml version="1.0" encoding="UTF-8" ?>     
<UserInfo>     
  <User UserID="UserID00" UserPwd="UserPwd00" UserLevel="158" />     
  <User UserID="UserID01" UserPwd="UserPwd01" UserLevel="162" />     
  <User UserID="UserID02" UserPwd="UserPwd02" UserLevel="165" />     
  <User UserID="UserID03" UserPwd="UserPwd03" UserLevel="168" />     
  <User UserID="UserID04" UserPwd="UserPwd04" UserLevel="171" />     
  <User UserID="UserID05" UserPwd="UserPwd05" UserLevel="175" />     
  <User UserID="UserID06" UserPwd="UserPwd06" UserLevel="178" />     
  <User UserID="UserID07" UserPwd="UserPwd07" UserLevel="181" />     
  <User UserID="UserID08" UserPwd="UserPwd08" UserLevel="184" />     
  <User UserID="UserID09" UserPwd="UserPwd09" UserLevel="188" />     
  </UserInfo>    
//UserInfo1.xml 
xml version="1.0" encoding="UTF-8" ?> 
<UserInfo> 
  <User UserID="UserID00" UserPwd="UserPwd00" UserLevel="158" /> 
  <User UserID="UserID01" UserPwd="UserPwd01" UserLevel="162" /> 
  <User UserID="UserID02" UserPwd="UserPwd02" UserLevel="165" /> 
  <User UserID="UserID03" UserPwd="UserPwd03" UserLevel="168" /> 
  <User UserID="UserID04" UserPwd="UserPwd04" UserLevel="171" /> 
  <User UserID="UserID05" UserPwd="UserPwd05" UserLevel="175" /> 
  <User UserID="UserID06" UserPwd="UserPwd06" UserLevel="178" /> 
  <User UserID="UserID07" UserPwd="UserPwd07" UserLevel="181" /> 
  <User UserID="UserID08" UserPwd="UserPwd08" UserLevel="184" /> 
  <User UserID="UserID09" UserPwd="UserPwd09" UserLevel="188" /> 
  </UserInfo>

七、產(chǎn)生

復(fù)制代碼代碼如下:

CString strID = _T("");     
      CString strPwd = _T("");     
      CMarkup xml;     
      xml.SetDoc("xml version=/"1.0/" encoding=/"UTF-8/"?>");     
      xml.AddElem("UserInfo");     
      xml.IntoElem();     
      for (int i=0; i<10; i++)     
      {     
              //產(chǎn)生一個隨機(jī)數(shù)，作為權(quán)限     
              srand(UINT(time(NULL)+i));     
              int nLevel = rand()%256;     
              strID.Format("UserID%02d",i);     
              strPwd.Format("UserPwd%02d",i);     
              xml.AddElem("User");     
              xml.AddAttrib("UserID",strID);     
              xml.AddAttrib("UserPwd",strPwd);     
              xml.AddAttrib("UserLevel",nLevel);     
      }     
      xml.OutOfElem();     
      xml.Save("UserInfo1.xml");    
CString strID = _T(""); 
      CString strPwd = _T(""); 
      CMarkup xml; 
      xml.SetDoc("xml version=/"1.0/" encoding=/"UTF-8/"?>"); 
      xml.AddElem("UserInfo"); 
      xml.IntoElem(); 
      for (int i=0; i<10; i++) 
      { 
              //產(chǎn)生一個隨機(jī)數(shù)，作為權(quán)限 
              srand(UINT(time(NULL)+i)); 
              int nLevel = rand()%256; 
              strID.Format("UserID%02d",i); 
              strPwd.Format("UserPwd%02d",i); 
              xml.AddElem("User"); 
              xml.AddAttrib("UserID",strID); 
              xml.AddAttrib("UserPwd",strPwd); 
              xml.AddAttrib("UserLevel",nLevel); 
      } 
      xml.OutOfElem(); 
      xml.Save("UserInfo1.xml");

八、查找

復(fù)制代碼代碼如下:

CMarkup xml;     
BOOL bLoad = false;     
BOOL bFind = false;     
bLoad = xml.Load("UserInfo1.xml");     
      if (bLoad)     
      {     
              CString strID;     
              CString strPwd;     
              xml.ResetMainPos();     
              xml.FindElem();    //UserInfo     
              while (xml.FindChildElem("User"))     
              {     
                    strID = xml.GetChildAttrib("UserID");     
                    strPwd = xml.GetChildAttrib("UserPwd");     
                    TRACE("/n----id:%s,pwd:%s-------/n",strID,strPwd);     
                    if (strID=="UserID00"&&strPwd=="UserPwd00")     
                    {     
                            bFind = true;     
                            break;     
                    }     
              }     
      }     
      if (bFind)     
      {     
              TRACE("/n---- find------/n");     
      }     
      else     
      {     
              TRACE("/n----no find------/n");     
      }    
CMarkup xml; 
BOOL bLoad = false; 
BOOL bFind = false; 
bLoad = xml.Load("UserInfo1.xml"); 
      if (bLoad) 
      { 
              CString strID; 
              CString strPwd; 
              xml.ResetMainPos(); 
              xml.FindElem();    //UserInfo 
              while (xml.FindChildElem("User")) 
              { 
                    strID = xml.GetChildAttrib("UserID"); 
                    strPwd = xml.GetChildAttrib("UserPwd"); 
                    TRACE("/n----id:%s,pwd:%s-------/n",strID,strPwd); 
                    if (strID=="UserID00"&&strPwd=="UserPwd00") 
                    { 
                            bFind = true; 
                            break; 
                    } 
              } 
      } 
      if (bFind) 
      { 
              TRACE("/n---- find------/n"); 
      } 
      else 
      { 
              TRACE("/n----no find------/n"); 
      }

九、修改

復(fù)制代碼代碼如下:

CMarkup xml;     
      BOOL bLoad = false;     
      BOOL bFind = false;     
      bLoad = xml.Load("UserInfo1.xml");     
      if (bLoad)     
      {     
              CString strID;     
              CString strPwd;     
              xml.ResetMainPos();     
              xml.FindElem();    //UserInfo     
              while (xml.FindChildElem("User"))     
              {     
                    strID = xml.GetChildAttrib("UserID");     
                    strPwd = xml.GetChildAttrib("UserPwd");     
                    TRACE("/n----id:%s,pwd:%s-------/n",strID,strPwd);     
                    if (strID=="UserID00"&&strPwd=="UserPwd00")     
                    {     
                            bFind = true;     
                            xml.SetChildAttrib("UserID",strID+CString("Modify"));     
                            xml.Save("UserInfo1.xml");     
                            break;     
                    }     
              }     
      }     
      if (bFind)     
      {     
              TRACE("/n---- find------/n");     
      }     
      else     
      {     
              TRACE("/n----no find------/n");     
      }    

CMarkup字符集問題
CMarkup支持Unicode，_MBCS宏定義。VS默認(rèn)設(shè)置為MBCS宏定義，未設(shè)置該宏時為UTF-8編碼。
有 MBCS宏定義，且打開的文件是UTF-8編碼：
CMarkup在Load時將UTF-8轉(zhuǎn)換ANSI編碼格式，所以要在讀取的地方設(shè)置
#include <locale.h>
setlocale(LC_ALL, "");
沒有MBCS宏定義，且打開的文件是UTF-8編碼：
系統(tǒng)默認(rèn)將文件按UTF-8格式讀入系統(tǒng)中，所以顯示的時候要手動將數(shù)據(jù)轉(zhuǎn)換為ANSI格式的進(jìn)行顯示
#include <locale.h>
setlocale(LC_ALL, "");
strVal = CMarkup::UTF8ToA(strVal);
PS：通過strcpy等拷貝函數(shù)可以修正。

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